BIOL 112 Lecture 12: Lecture 12 - Heredity .pdf

• School: McGill University
• Department: Biology
• Course: BIOL 112
• Professor: Frieder Schoeck

Document Summary

All organisms come form other organisms ! Siblings are not identical! chromosomes, mitochondria, ribosomes) ! Which traits you get vary among you and your siblings ! Cells fusing; one sperm fertilizes one egg to produce a progeny ! !- with microscopy could see what the essence was that mixed to produce a progeny ! !- mother cell -> 2 daughter cells ! Dividing cells devote a lot of resources to segregating their chromosomes ! Chromosome: a single string of dna; dna is packaged into chromosomes ! Daughter cells need to inherit everything they need to be a functional cell (ie nucleus, When the cell is preparing to divide, the chromosome condenses by associating with. Displays number of chromosomes in a cell ! Prepared by arresting cells in metaphase of mitosis (chromosomes are condensed), proteins (ie histones - proteins which chromosomes wrap around)! Combination of protein and dna is called chromatin ! Dna wrapped around 8 histone molecules = nucleosome !